GREENWICH AVENUE PSYCHIATRY, PC
NPI 1033819453
Psychiatry & Neurology - Child & Adolescent Psychiatry in Old Greenwich, CT
NPI Status: Active since March 06, 2023
Contact Information
3 W END AVE STE 111
OLD GREENWICH, CT
ZIP 06870
Phone: (917) 540-0230
Fax: (917) 900-1602
- Organization
- Psychiatry & Neurology
- Child & Adolescent Psychiatry
About GREENWICH AVENUE PSYCHIATRY, PC
This page provides the complete NPI Profile along with additional information for Greenwich Avenue Psychiatry, Pc, a provider established in Old Greenwich, Connecticut operating as a Psychiatry & Neurology, focusing in child & adolescent psychiatry . The healthcare provider is registered in the NPI registry with number 1033819453 assigned on March 2023. The practitioner's primary taxonomy code is 2084P0804X. The provider is registered as an organization and their NPI record was last updated one year ago. Greenwich Avenue Psychiatry, Pc operates as a Multi-Specialty Group with one or more individual practitioners, who practice different areas of specialization. The authorized official of this NPI record is Dr. Marc Philip Halperin Md (President)
- NPI
- 1033819453
- Provider Name
- GREENWICH AVENUE PSYCHIATRY, PC
- Entity Type
- Organization
- Location Address
- 3 W END AVE STE 111 OLD GREENWICH, CT 06870
- Location Phone
- (917) 540-0230
- Location Fax
- (917) 900-1602
- Mailing Address
- 3 W END AVE STE 111 OLD GREENWICH, CT 06870
- Mailing Phone
- (917) 540-0230
- Is Sole Proprietor?
- No
- Is Organization Subpart?
- No
- Enumeration Date
- 03-06-2023
- Last Update Date
- 06-04-2025
- Code Navigator
Location Map
Specialty - Primary Taxonomy
The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.
- Classification
Psychiatry & Neurology Child & Adolescent Psychiatry
- Taxonomy Code
- 2084P0804X
- Type
- Allopathic & Osteopathic Physicians
- Taxonomy Description
- Child & Adolescent Psychiatry is a subspecialty of psychiatry with additional skills and training in the diagnosis and treatment of developmental, behavioral, emotional, and mental disorders of childhood and adolescence.
Secondary Taxonomies
The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.
| No. | Taxonomy Code | Type | Classification / Specialization |
License No. (State) |
|---|---|---|---|---|
| 1 | 2084P0800X | Allopathic & Osteopathic Physicians | Psychiatry & Neurology |
Group Taxonomy 193200000X MULTI-SPECIALTY GROUP
This provider is a business group of one or more individual practitioners, who practice with different areas of specialization.
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NPI NPI Number Validation
How NPI Validation Works
The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.
To verify the NPI 1033819453, we treat the final digit (3) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 57. The final step is to find the difference between that total and the next multiple of ten (60 - 57 = 3).
Digit-by-digit view
Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.
Step 1: Double every other digit from the right
Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 57 is 60. The difference is the calculated check digit.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1033819453, enumerated as an "organization" on March 06, 2023.
The provider is located at 3 W END AVE STE 111 OLD GREENWICH, CT 06870 and the phone number is (917) 540-0230.
Psychiatry & Neurology with taxonomy code 2084P0804X and a focus in Child & Adolescent Psychiatry.
